646476498 has 16 divisors (see below), whose sum is σ = 1436614560. Its totient is φ = 215492148.

The previous prime is 646476487. The next prime is 646476517. The reversal of 646476498 is 894674646.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 11971787 = 646476498 / (6 + 4 + 6 + 4 + 7 + 6 + 4 + 9 + 8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5985840 + ... + 5985947.

It is an arithmetic number, because the mean of its divisors is an integer number (89788410).

Almost surely, 2^646476498 is an apocalyptic number.

646476498 is an abundant number, since it is smaller than the sum of its proper divisors (790138062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646476498 is a wasteful number, since it uses less digits than its factorization.

646476498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11971798 (or 11971792 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The square root of 646476498 is about 25425.9021078899. The cubic root of 646476498 is about 864.6710402258.

The spelling of 646476498 in words is "six hundred forty-six million, four hundred seventy-six thousand, four hundred ninety-eight".